diff --git a/package.json b/package.json
index 89550fd..4b40534 100644
--- a/package.json
+++ b/package.json
@@ -29,7 +29,7 @@
     "grunt-mocha-phantomjs": "^4.0.0",
     "grunt-mocha-test": "^0.13.2",
     "grunt-noflo-browser": "^1.5.0",
-    "mocha": "^5.0.0"
+    "mocha": "^6.0.0"
   },
   "noflo": {
     "icon": "github"